import {  constantRoutes } from '@/router'
//导入获取菜单数据的方法
import { getMenuList } from '@/api/user';
//导入Layout组件
import Layout from '@/layout'

/**
 * 判断当前登录用户是否有拥有该交色下的菜单信息
 * @param roles
 * @param route
 * @returns {boolean|*}
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * 过滤出所拥有的的菜单信息
 * @param routes
 * @param roles
 * @returns {*[]}
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []
  routes.forEach(route => {
    const tmp = { ...route }
    //判断是否有相应的权限
    if (hasPermission(roles, tmp)) {
      //获取组件
      const component = tmp.component;
      //判断该路由使用有组件
      if(route.component){
        //判断是否是根组件
        if(component === 'Layout'){
          tmp.component = Layout;
        }else{
          //获取对应的具体的组件信息
          tmp.component = (resolve) => require([`@/views${component}`],resolve)
        }
      }
      //判断是否有子菜单
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })
  return res
}



const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  /**
   * 动态生成路由
   * @param state
   * @param routes
   * @constructor
   */
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise((resolve,reject) => {
      //发送查询菜单数据的请求
      getMenuList().then(res=>{
        console.log(res)
        let accessedRoutes;//存放对应权限的路由信息
        //如果状态码为200，则表示成功
        if(res.code === 200){
          accessedRoutes = filterAsyncRoutes(res.data, roles)
        }
        //将路由信息保存到store中
        commit("SET_ROUTES",accessedRoutes);
        resolve(accessedRoutes);
      }).catch(error=>{
        reject(error);
      });
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}



